arm: Add a _neon suffix to all internal functions

This eases disambiguating these functions when looking at perf
profiles.
21 jobs for master in 7 minutes and 20 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Style
passed #269028
amd64 debian
style-check

00:00:24

 
  Build
passed #269029
amd64 debian
build-debian

00:00:42

passed #269037
debian aarch64
build-debian-aarch64

00:01:37

passed #269038
debian aarch64
build-debian-aarch64-clang-5

00:01:08

passed #269041
debian armv7
build-debian-armv7

00:02:44

passed #269042
debian armv7
build-debian-armv7-clang-5

00:01:11

passed #269030
amd64 debian
build-debian-static

00:00:41

passed #269040
debian aarch64
build-debian-werror

00:00:40

passed #269031
amd64 debian
build-debian32

00:00:41

passed #269039
macos
build-macos

00:00:32

passed #269043
amd64 debian allowed to fail
build-ubuntu-snap

00:01:09

passed #269035
amd64 debian
build-win-arm32

00:00:31

passed #269036
amd64 debian
build-win-arm64

00:00:35

passed #269032
amd64 debian
build-win32

00:00:45

passed #269033
amd64 debian
build-win32-unaligned-stack

00:00:39

passed #269034
amd64 debian
build-win64

00:00:43

 
  Test
passed #269044
amd64 debian
test-debian

00:00:57

passed #269045
amd64 debian
test-debian-asan

00:02:15

passed #269046
amd64 debian
test-debian-msan

00:01:16

passed #269047
amd64 debian
test-debian-ubsan

00:01:22

passed #269048
amd64 debian
test-win64

00:00:53